IPA: /ˈmɪmɪkər/
KK: /ˈmɪmɪkər/
A person who copies or imitates someone else's actions, words, or behavior, often for fun or to make others laugh.
The comedian was a great mimicker, able to imitate famous actors perfectly.
Mimicker → It is formed from "mimic" (from Greek "mimikos", meaning to imitate) and "-er" (meaning a person who). A mimicker is a person who imitates or copies the actions or speech of others.
Think of someone who 'imitates' ('mimic') others — the '-er' just means a person. A mimicker is someone who imitates.